New York City Comptroller Scott Stringer might be the Big Apple’s chief fiscal officer, but he’s also a huge Jets fan who has been known to occasionally rearrange his busy schedule to watch his favorite team play. After witnessing five decades of Gang Green’s failed, quick-fix plans and other losing ways, Stringer, 56, is so fed up he has decided to call an audible from City Hall and provide a much-needed public service for his beloved club. He’s tapping into the years of financial expertise he has gained monitoring the city’s cash coffers, along with his own football fandom, to offer the Jets his master plan for becoming consistent winners and — God willing — capturing another Super Bowl in his lifetime. As told to The Post’s Rich Calder.

The problem with the Jets franchise is they’ve long suffered from delusions of Super Bowl grandeur.

For decades, they’ve never really been willing to commit to multiple years of painful rebuilding, always thinking they’re one step, or one free-agent signing away, from a championship — when nothing can be further from the truth.

As comptroller, my job is to monitor the city’s books, and I’m a big believer in thinking ahead while always having a long-term plan. It’s about time the Jets also start thinking long-term because, quite frankly, there is no quick fix for the franchise.

At my age, I don’t want to keep waiting for another Super Bowl, and now I have two young boys: Max, 5; and Miles, 4, who I’ve persuaded to become Jets fans.

I love those kids and don’t want them suffer like I have after thinking I made the greatest choice in the world in 1969, when I fell in love with Jets as an 8-year-old watching my favorite player of all-time, Joe Namath, lead them to victory in Super Bowl III. That’s why we need to do this rebuild the right way.

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For starters, the Jets should seriously consider cutting talented, but often injured, wide receiver Eric Decker. He’s terrific, and though we need veterans, we also have a promising group of young receivers we should try to nurture. They should also deal veteran running back Matt Forte and defensive end Sheldon Richardson, who — as talented as he is — brings too much baggage. We already have playmakers at the position.

Jets general manager Mike Maccagnan is off to a solid start this offseason, securing salary-cap relief for future years by cutting Darrelle Revis, Brandon Marshall and other aging stars who underperformed during last year’s unexpected 5-11 disaster.

My suggestions would save roughly another $19 million in salary-cap space this season for a team currently just $9 million under the cap that still needs to spend money signing upcoming draft picks. More importantly, it will free up millions of dollars in additional cap savings for 2018, when the Jets should be in better shape to actually court prized free agents.

Forte and Richardson should also each bring back at least a fourth-round pick in trades. That brings me to the key part of my plan: stockpiling draft picks the same way a fiscally responsible government collects surplus funds for future emergencies.

The Jets currently have seven picks in this week’s NFL draft. I believe there’s a big deal to be had. For instance, the Jets should try swapping the sixth overall pick with the Browns for a package that includes the 12th-overall pick Cleveland secured in a previous deal and their second-round pick (No. 33 overall).

If such a deal to trade down in the first round can’t be reached, the Jets must use their own pick to shore up their secondary. Viable options include Ohio State cornerback Marshon Lattimore or LSU safety Jamal Adams.

As this deep draft plays out, Maccagnan should always look to trade down and collect more picks for both this draft and future years. And his focus must be on drastically improving the secondary, linebackers and offensive line.

In case there are any doubts, my message is clear: DON’T DRAFT A QUARTERBACK!

Unless the Jets start developing a strong offensive line, they shouldn’t be bringing in another young quarterback this year and potentially damaging his career by throwing him into a system he’s not ready for.

Bryce Petty and Christian Hackenberg might not be the long-term answer, but journeyman quarterback Josh McCown certainly isn’t. Petty and Hackenberg should get the majority of training-camp reps behind center — even though the ultimate results could leave the Jets staring at a lousy 1-15 kind of season.

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Though I would never outwardly root for the Jets to lose to secure a top 2018 pick, the consolation for finishing badly is that next year’s draft class for quarterbacks is much better. USC’s Sam Darnold, UCLA’s Josh Rosen and other top prospects are expected to come out.

Meanwhile, the free-agent quarterback class of 2018 is also stacked with talent such as Kirk Cousins and Matthew Stafford. However, my preference is drafting a blue-chip quarterback the team can invest in and become championship contenders for the next 10 years.

Jets fans must accept the club is better off rebuilding over the next two to three years than trying the same “competitive rebuild” method that never seems to work for the franchise. In fact, a true rebuild should have taken place five years ago.

We need to give Maccagnan and coach Todd Bowles a chance now that they were brought back for this year. Jets owner Woody Johnson must commit to keeping them both through at least the 2018 season — no matter how bad the team finishes this season.

Otherwise, the Jets are just going to be staring at another rebuild that includes an entirely new staff.